AC-PIR. The YALE PIR Motion Detector is compatible with the Yale Sync and Yale Intruder alarm ranges. When set, the alarm will be activated if motion is detected, and will work up to 200m away from the control panel. Batteries and fixings are included and it comes complete with a 2 year guarantee.. When the alarm is set, the infrared sensor will pick up movement and activate the siren. Ideally placed in the corner of any room. For use in extra rooms that need protection, such as lounge, bedroom or extension. Can be added at the time of installation or at a later date